<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>面向对象</title>
</head>
<body>

    <script>
        function Foo() {
            getName = function () { 
        console.log(1); 
        };
            return this;
        }
        Foo.getName = function () {
        console.log (2);
        };
        Foo.prototype.getName = function () {
        console.log (3);
            };
        var getName = function () { 
        console.log(4);
        };
        function getName() { 
        console.log (5);
        }
    
        Foo.getName();
        getName();
        Foo().getName();
        getName();
        new Foo.getName();
        new Foo().getName();
        new new Foo().getName();
    </script>
</body>
</html>